The House Mouse is small with a pointed snout, and a long mostly hairless tail, they are grayish brown and are all over the United States. These rodents are thought to be the most troublesome and costly as they can live and thrive under extreme conditions, consuming and contaminating foods for humans such as cereal grains, pet food, and livestock grains, and they also can transmit salmonellosis, a form of food poisoning. House mice can live in small places with very little food or water so the best means of control is eliminating gaps wider than one-fourth inch; therefore, eliminating their means of shelter.

Pack Rats get their name from their habit of taking small, bright or shiny objects and saving them in their nests. Pack rats will often take little pieces of foil, coins, or even jewelry. They prefer to find food indoors, however will forage outdoors for most of their foods. Pack Rats have long tails, hairy ears and vary in color from gray; buff or brown. They have white undersides and white feet and can become a nuisance stealing treasures, destroying electrical wires, and wreaking noisy havoc.

Norway Rats enter buildings through one-half inch gaps. They are nocturnal, shy, and very cautious when their environment changes or differs. Nesting under sidewalks, concrete pads, railroad tracks and next to buildings they eat foods like cereal, fish and meats and must have a non-food water source.

The Deer Mouse is an active mouse year-round, their diets consisting of nuts, berries and insects. They enter structures during Fall and Winter and are associated with the transmission of the Hantavirus in which they gained notoriety. Disease mortality in humans is around sixty percent, and they are in all fifty states in America.